Abstract
ABSTRACT This Investigation was concerned with the potential of the high-speed abrasive-entrained, cavitating and plain water Jets for selective mining of metal-bearing rock minerals, by slotting along the seams or fragmentation within the ore zone. Limited number of tests were conducted in the laboratory on slotting of metal-bearing and non-metal-bearing (muck or waste) rock samples supplied by the mines in Northern Ontario, Canada. The range of independent variables investigated were as follows: Tests with cavitating jets, issuing from a simple conical entry and from a centre-body nozzle, were conducted under submerged conditions. The nozzle diameter was held constant at 1·20 nun for all the tests. The conclusion from this preliminary and limited investigation was that all three types of high-speed water jets have a good potential for selective mining of netal bearing rock material, although more work Is required to optimize the nozzle systems. Within the range of variables investigated, the jets had vi...
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